<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <!-- alert警告 -->
      <el-alert :closable="false" show-icon title="注意：只允许为第三级分类设置相关参数" type="warning"></el-alert>
      <!-- 渲染商品分类 -->
      <el-row>
        <el-col>
          <span>选择商品分类:</span>
          <!-- 级联选择器 -->
          <el-cascader
            v-model="selectedCateKeys"
            :options="cateList"
            :props="cateProps"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <!-- Tabs 标签页 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <el-tab-pane label="动态参数" name="many">
          <!-- 添加动态参数按钮 -->
          <el-button type="primary" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加参数</el-button>
          <!-- 渲染参数表格 -->
          <el-table :data="manyTableData" stripe border style="width: 100%">
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- <pre>{{scope.row}}</pre> -->
                <el-tag
                  closable
                  v-for="(item,i) in scope.row.attr_vals"
                  :key="i"
                  @close="deleteVal(i,scope.row)"
                >{{item}}</el-tag>
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                >+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column prop="attr_name" label="参数名称"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" size="mini" icon="el-icon-edit">编辑</el-button>
                <el-button
                  type="danger"
                  size="mini"
                  icon="el-icon-delete"
                  @click="deletePar(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button type="primary" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加属性</el-button>
          <!-- 渲染属性表格 -->
          <el-table :data="onlyTableData" stripe border style="width: 100%">
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- <pre>{{scope.row}}</pre> -->
                <el-tag
                  closable
                  v-for="(item,i) in scope.row.attr_vals"
                  :key="i"
                  @close="deleteVal(i,scope.row)"
                >{{item}}</el-tag>
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                >+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column prop="attr_name" label="属性名称"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" size="mini" icon="el-icon-edit">编辑</el-button>
                <el-button
                  type="danger"
                  size="mini"
                  icon="el-icon-delete"
                  @click="deletePar(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加参数 属性 对话框 -->
    <el-dialog
      :title="'添加'+titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <el-form :model="addParForm" :rules="addParFormRules" ref="addParFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addParForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addPar">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      cateList: [],
      selectedCateKeys: [],
      cateProps: {
        expandTrigger: "hover",
        // checkStrictly: true,
        value: "cat_id",
        label: "cat_name",
        children: "children"
      },
      activeName: "many",
      manyTableData: [],
      onlyTableData: [],
      addDialogVisible: false,
      addParForm: {
        attr_name: ""
      },
      addParFormRules: {
        attr_name: [
          {
            required: true,
            message: "请输入参数",
            trigger: "blur"
          }
        ]
      }
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status != 200) return this.$message.error(res.meta.msg);
      this.cateList = res.data;
      // console.log(this.cateList);
    },
    handleChange() {
      // console.log(this.selectedCateKeys);
      this.getParamsData();
    },
    handleTabClick() {
      // console.log(this.activeName);
      this.getParamsData();
    },
    async getParamsData() {
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = [];
        this.manyTableData = [];
        this.onlyTableData = [];
        return;
      }
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: { sel: this.activeName }
        }
      );
      if (res.meta.status != 200) return this.$message.error(res.meta.msg);
      this.$message.success(res.meta.msg);
      // console.log(res);
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(" ") : [];
        item.inputVisible = false;
        item.inputValue = "";
      });
      if (this.activeName == "many") {
        this.manyTableData = res.data;
      } else {
        this.onlyTableData = res.data;
      }
      console.log(this.manyTableData);
      // console.log(this.onlyTableData);
    },
    addDialogClosed() {
      this.$refs.addParFormRef.resetFields();
    },
    addPar() {
      // console.log(1);

      this.$refs.addParFormRef.validate(async valid => {
        if (!valid) return;
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          {
            attr_name: this.addParForm.attr_name,
            attr_sel: this.activeName
          }
        );
        if (res.meta.status != 201) return this.$message.error(res.meta.msg);
        this.$message.success(res.meta.msg);
        this.getParamsData();
        this.addDialogVisible = false;
      });
    },
    async deletePar(id) {
      // console.log(id);
      const confirmResult = await this.$confirm(
        "此操作将永久删除该参数, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);
      if (confirmResult !== "confirm") return this.$message.info("已取消成功");
    },
    handleInputConfirm(row) {
      if (row.inputValue.trim().length == 0) {
        row.inputValue = "";
        row.inputVisible = false;
        return;
      }
      row.attr_vals.push(row.inputValue);
      row.inputValue = "";
      row.inputVisible = false;
      this.saveAttrVals(row);
    },
    async saveAttrVals(row) {
      // 发送请求
      const { data: res } = await this.$http.put(
        `categories/${this.cateId}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(" ")
        }
      );
      if (res.meta.status != 200) return this.$message.error(res.meta.msg);
      this.$message.success(res.meta.msg);
    },
    showInput(row) {
      row.inputVisible = true;
      // console.log(this.$refs.saveTagInput.$refs);
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus();
      });
    },
    deleteVal(i, row) {
      row.attr_vals.splice(i, 1);
      this.saveAttrVals(row);
    }
  },
  computed: {
    isBtnDisabled() {
      if (this.selectedCateKeys.length !== 3) {
        return true;
      }
      return false;
    },
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2];
      }
      return null;
    },
    titleText() {
      if (this.activeName == "many") {
        return "动态参数";
      } else {
        return "静态属性";
      }
    }
  }
};
</script>
<style lang="less" scoped>
.el-row {
  margin: 15px 0;
}
.el-tag {
  margin: 10px;
}
.input-new-tag {
  width: 120px;
}
</style>  